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Related Experiment Video

Updated: Dec 14, 2025

Age-dependent Dynamics of Locomotion in Caenorhabditis elegans: A Lyapunov Exponent Analysis
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Age-dependent Dynamics of Locomotion in Caenorhabditis elegans: A Lyapunov Exponent Analysis

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Biophysical dynamics in disorderly environments.

David R Nelson1

  • 1Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA. nelson@physics.harvard.edu

Annual Review of Biophysics
|March 27, 2012
PubMed
Summary
This summary is machine-generated.

Disorder impacts biological dynamics, influencing species spread, DNA unzipping, and bacterial cell wall growth through mechanisms like anomalous diffusion and defect interactions.

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Area of Science:

  • Biological dynamics
  • Non-equilibrium physics
  • Biophysics

Background:

  • Time-independent disorder significantly impacts biological systems far from equilibrium.
  • Understanding these disordered systems is crucial for comprehending fundamental biological processes.

Purpose of the Study:

  • To review three key areas where time-independent disorder influences biological dynamics.
  • To explore anomalous localization, DNA unzipping, and bacterial cell wall growth.

Main Methods:

  • Review of theoretical models and experimental observations.
  • Analysis of diffusion, fluid advection, and anomalous localization dynamics.
  • Examination of single-molecule force-extension curves and DNA unzipping transitions.
  • Modeling of bacterial cell wall growth via peptidoglycan strand extension and dislocations.

Main Results:

  • Frozen heterogeneities lead to anomalous localization dynamics in spreading species.
  • DNA sequence heterogeneity dictates unzipping physics, with anomalous dynamics near transitions.
  • Dislocations mediate bacterial cell wall growth, with interactions influenced by elastic forces.

Conclusions:

  • Disorder is a critical factor in diverse biological phenomena, from molecular to cellular scales.
  • Anomalous dynamics and defect interactions are key to understanding these processes.
  • The reviewed areas highlight the broad applicability of disorder in biological physics.